Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eaef358eb37994196e4dfa1a240977a0b832a3f32e7e19faa1bdbe655fa42bc7' 
  AND token = '/du/42HUgihtBAJidL1aYBTnYeja3Q6FCOzHzXSHdPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}